<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1339722
-->
<head>
  <meta charset="utf-8">
  <title>Test for Bug 1339722</title>
  <script type="application/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="chrome://global/skin"/>
  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
  <script type="application/javascript">

  /**
   * Test for Bug 1339722
   * 1. Wait for "http-on-useragent-request" for the iframe load.
   * 2. In the observer, access it's window proxy to trigger DOMWindowCreated.
   * 3. In the event handler, delete the iframe so that the frameloader would be
   *    destoryed in the middle of ReallyStartLoading.
   * 4. Verify that it doesn't crash.
  **/

  const {interfaces: Ci, utils: Cu} = Components;
  Cu.import("resource://gre/modules/Services.jsm");

  const TOPIC = 'http-on-useragent-request';
  Services.obs.addObserver({
    observe(subject, topic, data) {
      info('Got ' + topic);
      Services.obs.removeObserver(this, TOPIC);

      // Query window proxy so it triggers DOMWindowCreated.
      let channel = subject.QueryInterface(Ci.nsIHttpChannel);
      let win = channel.notificationCallbacks.getInterface(Ci.mozIDOMWindowProxy);
    }
  }, TOPIC, false);

  let docShell = SpecialPowers.wrap(window)
                              .QueryInterface(Ci.nsIInterfaceRequestor)
                              .getInterface(Ci.nsIDocShell);
  docShell.chromeEventHandler.addEventListener('DOMWindowCreated', function handler(e) {
    docShell.chromeEventHandler.removeEventListener('DOMWindowCreated', handler);
    let iframe = document.getElementById('testFrame');
    is(e.target, iframe.contentDocument, 'verify event target');

    // Remove the iframe to cause frameloader destroy.
    iframe.remove();
    setTimeout($ => {
      ok(!document.getElementById('testFrame'), 'verify iframe removed');
      SimpleTest.finish();
    }, 0);
  });

  SimpleTest.waitForExplicitFinish();
  </script>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1339722">Mozilla Bug 1339722</a>
<p id="display"></p>
<div id="content" style="display: none"></div>
<pre id="test">
  <div id="frameContainer">
    <iframe id="testFrame" src="http://www.example.com"></iframe>
  </div>
</pre>
</body>
</html>
